As we have previously opined, January's annual two-day Winter Jazzfest is one of the season's signature live-music events, packing an ever-expanding number of downtown clubs (five this year) with an ever-expanding cabal of folks inexplicably angling to hear tough, ambitious downtown jazz. 2011's slate is set for January 7-8 at Le Poisson Rouge, Kenny's Castaways, Zinc Bar, Sullivan Hall, and Bitter End; tickets are on sale Friday, $25 per day, $35 for the both of 'em. As with globalFEST, you are guaranteed to encounter something you haven't heard before but will be very glad you did -- maybe this year it'll be, uh, Mike Pride's From Bacteria To Boys. To that end, here's the early lineup: